Tooth crest flatness detection equipment for gear

Abstract

The invention relates to the field of mechanical detection, in particular to tooth crest flatness detection equipment for a gear, and the equipment comprises a containing table and a controller, the containing table is provided with a matching column, and the matching column is used for installing a to-be-detected gear; the containing table is provided with a reflecting frame, the reflecting frame surrounds the matching column, and a plurality of inclined reflecting mirrors are arranged on the inner side of the reflecting frame; a transverse frame is arranged at the top of the reflection frame, and an image sensor is fixedly connected to the bottom of the transverse frame and used for collecting images reflected by the reflectors; the controller is used for obtaining the image collected by the image sensor and judging whether the tooth crest of the gear is flat or not based on image recognition.

Description

Technical Field

[0001] The present invention relates to the field of mechanical detection, and in particular to a tooth top flatness detection device for gears. Background Art

[0002] The tooth tip is the surface of the tooth located at the top of the tooth, encompassed by the tooth tip curve. It is a well-defined positioning feature within the gear geometry. For external gears, the tooth tip surface is the surface of the tooth body farthest from the axis, while for internal gears, it is the surface closest to the axis. In cylindrical gears, the tooth tip curve is specialized as the tooth tip cylindrical surface, with its boundary dimensions determined by the tooth tip diameter formula. During meshing, the tooth tip curve contributes to the effective tooth contact area, directly influencing the sliding coefficient distribution and wear characteristics of the gear pair. Tooth tip modification techniques are often used in engineering applications to optimize contact stress distribution and prevent edge wear.

[0003] Prior art, such as CN119334230B, discloses a gear tooth tip flatness inspection device that improves inspection accuracy by removing dust from the gear tooth tips. However, gears have numerous teeth, resulting in each tooth tip being independent. Conventional inspection methods use measuring tools, requiring individual inspection of each tooth tip, which is labor-intensive. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a tooth top flatness detection device for gears, which is used to reduce the workload of tooth top detection through a reflector.

[0005] In order to achieve the above-mentioned object, the technical solution of the present invention is as follows: a device for detecting the flatness of a tooth tip of a gear, comprising a placing table and a controller, wherein a matching column is provided on the placing table, and the matching column is used to mount the gear to be detected; The placing table is provided with a reflecting frame, which surrounds the matching column, and a plurality of inclined reflecting mirrors are provided on the inner side of the reflecting frame; A horizontal frame is provided on the top of the reflector frame, and an image sensor is fixedly connected to the bottom of the horizontal frame. The image sensor is used to collect images reflected by each reflector; The controller is used to obtain the image captured by the image sensor and determine whether the gear tooth top is flat based on image recognition.

[0006] The above scheme has the following beneficial effects: 1. In this solution, when the user detects the flatness of the gear tooth top, the gear is coaxially fixed on the matching column. The reflector is set around the gear so that the images of the gear tooth tops are reflected by the reflector. The image sensor is located at the bottom of the horizontal frame and can capture the reflected images of the tooth tops. The images of multiple tooth tops are then unified in a single perspective, allowing the image sensor to analyze the conditions of multiple tooth tops through a single acquisition. Compared with the existing technology, the design of the reflector frame and the reflector allows the user to not need to detect each tooth top separately, but instead use the reflector to reflect each tooth top of the gear into the imaging range of the image sensor for detection.

[0007] 2. In this solution, the controller uses images to identify whether there are any unevenness on the tooth tops, marks the uneven areas on the tooth tops, and completes the flatness detection.

[0008] Furthermore, the inclination angle of the reflector is 45 degrees, and the reflector is detachably connected to the inner side of the reflector frame.

[0009] Beneficial effect: The reflector has an inclination angle of 45 degrees, thereby reflecting horizontal light into vertical light so that it can be collected by the image sensor placed at the bottom of the horizontal frame.

[0010] Furthermore, a Velcro surface is provided on the inner side of the reflector frame, and a Velcro hook surface is provided on the back side of the reflector, and the reflector and the reflector frame are detachably connected via the Velcro surface and the Velcro hook surface.

[0011] Beneficial effect: Different gears have different numbers of teeth and diameters. In order to adapt to the detection of different gears, the reflector is set to be detachably connected to the reflector frame through the Velcro fur surface and the Velcro hook surface, so that the user can adapt by installing different reflectors according to the different gears to be detected.

[0012] Furthermore, the width of the gear tooth top imaging range of the reflector corresponds to the gear tooth top width.

[0013] Advantages: A reflector that is too wide may reflect the tooth root or tooth surface into the reflected image, causing the reflector to reflect other areas of the gear. This requires the controller to identify the position of the tooth top in the captured image. However, the width of the reflector's imaging range for the gear tooth top corresponds to the width of the gear tooth top, so that only the tooth top is imaged in the image, eliminating the need to distinguish between the tooth top and the rest of the gear.

[0014] Furthermore, a matched pair of laser beam switches are provided on the placing table and the horizontal frame, and the monitoring range of the laser beam switches is aligned with the edge of the imaging range of the reflector.

[0015] Beneficial effect: During testing, it is necessary to ensure that the gear tooth top and the reflector are aligned. The laser beam switch can be triggered after the gear tooth at the tooth top touches the beam of the laser beam switch, helping the user to determine the gear tooth position and align the gear tooth top and the reflector.

[0016] Furthermore, the mating column is provided with a motor for driving the mating column to rotate, the controller is used to control the motor to drive the mating column to drive the gear to rotate, and the laser beam switch is used to determine whether the gear teeth reach the monitoring range of the laser beam switch. If they reach the range, the controller controls the motor to brake.

[0017] Beneficial effect: The mating column can be driven by a motor to rotate, so that when the gear teeth reach the monitoring range of the laser beam switch, the motor braking is automatically controlled to complete the automatic alignment of the gear.

[0018] Furthermore, a telescopic rod is provided at the bottom of the horizontal frame, and one end of the telescopic rod away from the horizontal frame is fixedly connected to a blowing tube.

[0019] Beneficial effect: The telescopic rod can be extended before testing, and dust can be blown off the gear tooth tops through the blower, so as to reduce the influence of dust adhering to the gear tooth tops on subsequent testing.

[0020] Furthermore, an annular slide rail is provided at the bottom of the horizontal frame, the telescopic rod is slidably connected to the slide rail, and a driving member for driving the telescopic rod to slide along the slide rail is provided on the slide rail.

[0021] Beneficial effect: the driving member can drive the telescopic rod to move along the slide rail, and then move around the gear to clean the dust on the gear in a surrounding manner.

[0022] Furthermore, one end of the telescopic rod away from the horizontal frame is fixedly connected to a wiping block, which is located on the back of the blowing cylinder. The wiping block is used to clean the reflector when the driving member drives the telescopic rod to slide.

[0023] Beneficial effect: The cleanliness of the reflector also affects the imaging process. The wiper is located on the back of the blower. When the blower cleans the gear, the wiper can also wipe the reflector to keep the reflector clean.

[0024] Furthermore, a trained convolutional neural network is provided in the controller. The convolutional neural network is trained based on image samples of stepped protrusions, depressions, collapses, scratches and textures on the tops of several gear teeth. The convolutional neural network is used to input images captured by the image sensor and select and mark the stepped protrusions, depressions, collapses, scratches and textures in the image.

[0025] Beneficial effect: A convolutional neural network is provided in the controller, which is used to recognize images captured by the image sensor to analyze the flatness of the gear tooth top.

[0026] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is an axonometric diagram of an embodiment of a gear tooth tip flatness detection device according to the present invention; Figure 2 A schematic diagram of a reflector frame according to an embodiment of a device for detecting tooth top flatness of a gear according to the present invention; Figure 3 A schematic diagram of an annular slide rail of an embodiment of a gear tooth top flatness detection device according to the present invention; Figure 4 This is a side structural schematic diagram of an embodiment of a gear tooth top flatness detection device according to the present invention; Figure 5 A schematic diagram of the lifting structure and gear matching of an embodiment of a gear tooth top flatness detection device of the present invention; Figure 6 This is an axonometric view of the lifting structure of an embodiment of the gear tooth tip flatness detection device of the present invention; Figure 7 This is an enlarged view of part A of an embodiment of a gear tooth top flatness detection device of the present invention; Figure 8 This is a cross-sectional view of the interior of a lifting platform of an embodiment of a gear tooth tip flatness detection device of the present invention; Figure 9 This is an enlarged view of part B of an embodiment of the tooth top flatness detection device for gears of the present invention.

[0028] The figure marks in the drawings of the specification include: 1. holding table; 2. matching column; 3. gear; 4. reflection frame; 5. reflector; 6. horizontal frame; 7. image sensor; 8. laser beam switch; 9. telescopic rod; 10. blow tube; 11. annular slide rail; 12. wiper block; 13. lifting platform; 14. detection ring; 15. through groove; 16. scraper block; 17. airbag strip; 18. air cavity; 19. piston rod; 20. blowing channel. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] The following is further described in detail through specific implementation methods: Example 1: As attached Figure 1 As shown, a gear tooth top flatness detection device includes a holding platform 1 and a controller. A matching column 2 is bolted to the holding platform 1. The end of the matching column 2 is provided with a spline for matching with the gear to be detected 3. The matching column 2 is used to install the gear to be detected 3.

[0033] The placing platform 1 is fixed with a reflective frame 4 by bolts. The reflective frame 4 surrounds the matching column 2. A plurality of tilted reflective mirrors 5 are detachably connected to the inner side of the reflective frame 4.

[0034] A cross frame 6 is provided on the top of the reflection frame 4, and the cross frame 6 and the placing platform 1 are fixedly connected by a support. Figure 3 As shown, an image sensor 7 is bolted to the bottom of the horizontal frame 6. The image sensor 7 is a wide-angle camera and is used to capture images reflected by each reflector 5. The reflector 5 has a tilt angle of 45 degrees. The inner side of the reflector frame 4 is provided with a Velcro surface, and the back side of the reflector 5 is provided with a Velcro hook surface. The reflector 5 and the reflector frame 4 are detachably connected via the Velcro surface and the Velcro hook surface. The number of reflectors 5 corresponds to the number of tooth tops of the gear 3. The width of the imaging range of the reflector 5 on the tooth top of the gear 3 corresponds to the width of the tooth top of the gear 3.

[0035] The controller includes a trained convolutional neural network. This convolutional neural network is trained based on image samples of several gear 3 tooth tops, including stepped protrusions, depressions, collapses, scratches, and lines. The image samples are images reflected by a 40°-50° reflector 5. The number of image samples exceeds 1800, and the learning rate of the convolutional neural network is between 0.01 and 0.05. The convolutional neural network is used to input images captured by the image sensor 7 and select and mark stepped protrusions, depressions, collapses, scratches, and lines in the images. The controller is used to obtain images captured by the image sensor 7 and determine whether the gear 3 tooth top is flat based on image recognition.

[0036] When the user detects the flatness of the tooth tops of the gear 3, the gear 3 is coaxially fixed on the matching column 2. The reflector 5 is arranged around the gear 3 so that the images of the tooth tops of the gear 3 are all reflected by the reflector 5. The image sensor 7 is located at the bottom of the cross frame 6 and can capture the reflected images of the tooth tops. The images of multiple tooth tops are then unified in a single perspective, so that the image sensor 7 can analyze the conditions of multiple tooth tops through a single acquisition. Compared with the existing technology, the design of the reflector frame 4 and the reflector 5 does not require the user to detect each tooth top separately, but instead uses the reflector 5 to reflect each tooth top of the gear 3 to the imaging range of the image sensor 7 for detection.

[0037] Reflector 5 is tilted at a 45-degree angle, reflecting horizontal light into vertical light for capture by image sensor 7, located at the bottom of horizontal frame 6. Different gears 3 have different numbers of teeth and diameters. To accommodate the detection of different gears 3, reflector 5 is detachably connected to reflector frame 4 via Velcro loops and hooks. This allows users to adapt the reflector 5 to the specific gear 3 being tested by installing different reflectors.

[0038] If the reflector 5 is too wide, the tooth roots or tooth surfaces may be reflected in the image, causing the reflector 5 to reflect other areas of the gear 3. This requires the controller to identify the position of the tooth tops in the captured image. However, the width of the imaging range of the gear 3 tooth tops by the reflector 5 corresponds to the width of the gear 3 tooth tops, so that only the tooth tops are imaged in the image, eliminating the need to distinguish between the tooth tops and other parts of the gear 3, thus reducing the computing power required for image recognition.

[0039] Example 2: The difference from the above embodiment is that, Figure 1 、 Figure 2 and Figure 3 As shown, a paired laser beam switch 8 is provided on the holding table 1 and the horizontal frame 6. The monitoring range of the laser beam switch 8 is aligned with the edge of the imaging range of the reflector 5. In addition, the specific installation position of the laser beam switch 8 can be adaptively adjusted according to actual conditions.

[0040] The matching column 2 is equipped with a motor for driving the matching column 2 to rotate. The controller is used to control the motor to drive the matching column 2 to drive the gear 3 to rotate. The laser beam switch 8 is used to determine whether the gear teeth of the gear 3 reach the monitoring range of the laser beam switch 8. If so, the controller controls the motor to brake.

[0041] A telescopic rod 9 is bolted to the bottom of the horizontal frame 6. The telescopic rod 9 is a pneumatic cylinder. A blower 10 is bolted to the end of the telescopic rod 9 away from the horizontal frame 6. The blower 10 is preferably a blower and electrically connected to the controller. An annular slide rail 11 is mounted on the bottom of the horizontal frame 6. The telescopic rod 9 is slidably connected to the slide rail. The slide rail is equipped with a driving member that drives the telescopic rod 9 to slide along the slide rail. The driving member is a roller. A wiper 12 is bolted to the end of the telescopic rod 9 away from the horizontal frame 6. The wiper 12 is located on the back of the blower 10 and is made of sponge. The wiper 12 is tilted at a 45° angle. The wiper 12 is used to clean the reflector 5 when the driving member drives the telescopic rod 9 to slide.

[0042] During testing, it is necessary to ensure that the tooth tops of gear 3 and reflector 5 are aligned. Laser beam switch 8 is triggered when the tooth at the tooth top contacts the beam from laser beam switch 8, assisting the user in determining the tooth position and aligning the tooth tops with reflector 5. The motor drives mating column 2 to rotate, automatically braking the motor once the gear 3 teeth reach the monitoring range of laser beam switch 8, completing the automatic alignment of gear 3.

[0043] Before testing, the telescopic rod 9 can be extended to allow the blower 10 to blow dust off the tooth tips of the gear 3, minimizing the impact of dust adhering to the gear 3 on subsequent testing. A driver can drive the telescopic rod 9 along the slide rail, allowing it to move around the gear 3, performing a circular cleaning of dust. The cleanliness of the reflector 5 also affects the imaging process. A wiper 12 is located on the back of the blower 10. While the blower 10 is cleaning the gear 3, the wiper 12 also wipes the reflector 5, maintaining its cleanliness.

[0044] Example 3: The difference from the above embodiment is that, in actual use, scratches on the surface of the reflector 5, light fluctuations during detection, oil reflections on the surface of the gear 3 (tooth top surface), etc. may be mistakenly judged as tooth top defects (for example, a hair on the reflector 5 may be identified as a "scratch" in the image). The training samples of the convolutional neural network are difficult to cover all extreme working conditions (such as concave reflections at special angles), and "false positives" (misjudged qualified as unqualified) or "false negatives" (misjudged unqualified as qualified) may occur. Therefore, in order to further reduce the risk of misjudgment, this solution, such as Figure 5 As shown, the top of the placing platform 1 is screwed to a lifting platform 13 electrically connected to the controller. The lifting platform 13 is annular, and the output end of the lifting platform 13 is screwed to a detection ring 14. Figure 6 and Figure 7 As shown, the inner ring of the detection ring 14 is provided with a number of through grooves 15 corresponding to the teeth of the gear 3, and a number of airbag strips 17 are bonded to the inner side of the through grooves 15 from top to bottom. The airbag strips 17 are made of elastic material (such as silicone) and are inflated to maintain an expanded state so that they can closely fit the curved surface of different tooth tops (regardless of whether the tooth top is a flat surface or a slightly curved surface), avoiding damage to the tooth top by rigid detection tools, and ensuring that the subsequent pressure signal can truly reflect the changes in surface concave and convexity. Scrapers 16 are welded on the inner sides of the through grooves 15. The scrapers 16 are located above the airbag strips 17. A sponge layer is bonded to the surface of the scrapers 16. Secondly, the scrapers 16 are located close to the top of the detection ring 14 and are tilted (such as 30° upwards) to facilitate the scraped dust or impurities to move along the upper inclined surface of the scraper 16 to the angle between the scraper 16 and the detection ring (acute angle), playing a collection and limiting role, facilitating subsequent cleaning, and reducing the impact of these dust on subsequent detection; when the detection ring 14 is lifted, the airbag strips 17 are in contact with the tooth top surface of the gear 3, and the airbag strips 17 are always in an expanded state. At the same time, piezoelectric sensors are provided on the surface of the airbag strips 17, and the piezoelectric sensors are electrically connected to the controller. At the same time, if Figure 6 and Figure 9 As shown, in this embodiment, due to the presence of the detection ring 14 and the lifting platform 13, the installation position and model of the laser beam switch 8 will be adjusted accordingly. The model of the laser beam switch 8 can be preferably M3-T2000N, so that the laser beam switch 8 can be embedded in the top of the lifting platform 13 and correspond to the through groove 15, ensuring that the light of the laser beam switch 8 can be blocked by the tooth top of the gear 3, thereby not affecting the alignment of the gear 3 and the reflector 5.

[0045] The specific exercises are as follows: In the initial state, the gear 3 to be tested is secured by the splines of the mating column 2. The tooth tips of the gear 3 correspond one-to-one with the slots 15 of the test ring 14 (the number of slots 15 matches the number of teeth on the gear 3). At this point, the test ring 14 is positioned below the gear 3, the airbag strips 17 are inflated but not contacting the tooth tips, and the distance between the scraper 16 and the tooth tips is approximately 2-3 mm.

[0046] When the detection ring 14 rises, the controller drives the lifting platform 13 (ring structure) to move upward, driving the detection ring 14 to rise synchronously. First, the scraper 16 (surface covered with a sponge layer) on the inside of the through groove 15 contacts the tooth top surface of the gear 3 before the airbag strip 17. As the detection ring 14 continues to rise, the scraper 16 slides along the tooth top surface, using the flexible adsorption effect of the sponge layer to remove dust, iron filings and other impurities on the tooth top surface, avoiding stains that cause the airbag strip 17 to have a false contact with the tooth top, ensuring the accuracy of the pressure signal. As the detection ring 14 continues to rise, the airbag strip 17 (always inflated) in the through groove 15 immediately comes into close contact with the tooth top surface. Since the airbag strip 17 is elastic, it will adaptively deform with the shape of the tooth top surface during the rising process (if the tooth top is flat, the airbag strip 17 is in uniform contact with the tooth top surface, the pressure distribution is stable, and its detection value is the standard value A); However, if there are protrusions on the tooth top (such as burrs, machining allowances, generally small in size), these protrusions have a small contact area with the surface of the airbag strip 17, resulting in local high pressure acting on the surface of the airbag strip 17; if there are depressions on the tooth top (such as missing material, wear), the corresponding position of the airbag strip 17 is subjected to reduced force (relative to the area that is not in contact with the tooth top surface).

[0047] The piezoelectric sensor on the surface of the airbag strip 17 then converts pressure changes into electrical signals in real time (piezoelectric effect: greater pressure results in higher output voltage). The controller receives the continuous voltage signal and converts it into a pressure curve. By analyzing the fluctuation amplitude of the curve (e.g., peaks correspond to convexities, and valleys correspond to concavities), the distribution characteristics of the tooth top flatness can be quantified. Furthermore, for the two aforementioned cases (convexities and concavities), the determination is made by comparing them with a standard value A: those greater than the standard value A are considered convexities, and those less than the standard value A are considered concavities. (For example, if a 0.1mm high burr is present on the tooth top, the output voltage of the piezoelectric sensor at that location will increase by 30%-50% compared to the flat area; if a 0.05mm deep pit is present on the tooth top, the voltage signal at that location will decrease by 20%-30%).

[0048] Next, the controller compares the pressure signal from the piezoelectric sensor with the tooth top image captured by image sensor 7 in Example 1 (for example, the "step-like protrusion" shown in the image should coincide with the peak position of the pressure curve). This dual data cross-validation improves the reliability of the test results. After the test is completed, the lifting platform 13 drives the detection ring 14 down to its initial position, awaiting the next test.

[0049] Example 4: The difference from the above embodiment is that, as described in Example 2, the wiper 12 wipes the reflector 5 to keep the reflector 5 clean. Specifically, when the telescopic rod 9 is extended downward, the wiper 12 wipes and cleans along the surface of the reflector 5 from top to bottom. The dust and impurities on the surface of the reflector 5 will be swept to the top of the holding platform 1. However, since the wiper 12 does not move downward continuously, the dust on the upper part of the reflector 5 may be wiped to the middle or lower part of the reflector 5 by the wiper 12 (depending on the movement distance of the telescopic rod 9), thereby affecting the accuracy of the image acquisition information. Therefore, in this solution, combined with Figure 8 As shown, a number of air cavities 18 are opened inside the lifting platform 13, and piston rods 19 are slidably fitted inside the air cavities 18. The top ends of the piston rods 19 are screwed to the bottom ends of the detection rings 14, that is, when the detection rings 14 are raised and lowered, the piston rods 19 make corresponding reciprocating motions in the air cavities 18, thereby changing the air pressure in the air cavities 18; the bottoms of the air cavities 18 are connected to blowing channels 20, and the other ends of the blowing channels 20 extend to the surface of the lifting platform 13 and correspond one-to-one to the lower ends of the reflectors 5, thereby respectively realizing adsorption cleaning and blowing cleaning of the lower ends of the reflectors 5 before and after detection.

[0050] Specifically, before the inspection, when the lifting platform 13 drives the inspection ring 14 to rise, the piston rod 19 moves up synchronously with the inspection ring 14, the space in the air cavity 18 increases, and the air pressure decreases to form a negative pressure. At this time, the blowing channel 20 generates suction due to the negative pressure, which forms a traction force on the dust accumulated at the lower end of the reflector 5 (such as impurities that slide to the lower end after wiping by the wiper 12), adsorbs and separates it from the surface of the reflector 5, and guides it to the top of the holding platform 1 to avoid dust residue at the lower end of the reflector 5; after the inspection is completed, the lifting platform 13 drives the inspection ring 14 to descend, and the piston rod 19 moves down accordingly to compress the air cavity 18, so that the air pressure in the air cavity 18 increases. At this time, the blowing channel 20 will blow out gas outward, and these gases are blown toward the surface of the reflector 5 in a direction, which can clean the dust that may be newly attached during the inspection process (such as tiny particles raised during the inspection of the gear 3), further ensuring the cleanliness of the reflector 5. Through this "suction first, then blow" cleaning method linked to the lifting and lowering of the detection ring 14, the lower end of the reflector 5 can be automatically cleaned by utilizing the air pressure change caused by mechanical movement without the need for an additional power source, which complements the wiping action of the wiper block 12 (the wiper block 12 is responsible for wiping the middle and upper part, and the air path is responsible for adsorption of the lower end and overall blowing), effectively avoiding dust residue affecting the imaging accuracy of the image sensor 7, while reducing the frequency and cost of manual cleaning, and providing a more reliable image basis for data verification of the image sensor 7.

[0051] In addition, for the dust that falls on the top of the holding platform 1, a dust cleaning door can be set at the corresponding position at the bottom of the holding platform 1, and the opening and closing can be controlled preferably by magnetic attraction. When there is a lot of dust on the top of the holding platform 1, the dust cleaning door can be opened and the dust in it can be poured out, which is convenient for the staff to clean quickly.

[0052] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications derived therefrom remain within the scope of protection of the present invention.

Claims

1. A gear tooth top flatness detection device, characterized in that: It comprises a placing table (1) and a controller, wherein a matching column (2) is provided on the placing table (1), and the matching column (2) is used for mounting a gear (3) to be tested; The placing table (1) is provided with a reflection frame (4), the reflection frame (4) surrounds the matching column (2), and a plurality of inclined reflection mirrors (5) are provided on the inner side of the reflection frame (4); A cross frame (6) is provided on the top of the reflector frame (4), and an image sensor (7) is fixedly connected to the bottom of the cross frame (6). The image sensor (7) is used to collect images reflected by each reflector (5); The controller is used to obtain an image captured by the image sensor (7) and determine whether the tooth top of the gear (3) is flat based on image recognition; The top of the holding table (1) is fixedly connected to a lifting platform (13) electrically connected to the controller, and the output end of the lifting platform (13) is fixedly connected to a detection ring (14), and the inner ring of the detection ring (14) is provided with a plurality of through grooves (15) corresponding to the teeth of the gear (3), and the inner sides of the through grooves (15) are bonded with a plurality of airbag strips (17) from top to bottom, and the airbag strips (17) are always in an expanded state; the inner sides of the through grooves (15) are fixedly connected to scrapers (16), and the scrapers (16) are all located above the airbag strips (17), and the surfaces of the scrapers (16) are bonded with a sponge layer, and the scrapers (16) are all close to the top of the detection ring (14) and are arranged obliquely; the surfaces of the airbag strips (17) are provided with piezoelectric sensors, and the piezoelectric sensors are all electrically connected to the controller; A plurality of air cavities (18) are provided inside the lifting platform (13), and piston rods (19) are slidably fitted inside the air cavities (18), and the top ends of the piston rods (19) are fixedly connected to the bottom ends of the detection rings (14); the bottom ends of the air cavities (18) are connected to air blowing channels (20), and the other ends of the air blowing channels (20) extend to the surface of the lifting platform (13) and correspond one-to-one to the lower ends of the reflectors (5).

2. The gear tooth top flatness detection device according to claim 1, characterized in that: The inclination angle of the reflector (5) is 45 degrees, and the reflector (5) is detachably connected to the inner side of the reflector frame (4).

3. The gear tooth top flatness detection device according to claim 2, characterized in that: The inner side of the reflector frame (4) is provided with a Velcro surface, and the back side of the reflector (5) is provided with a Velcro hook surface. The reflector (5) and the reflector frame (4) are detachably connected via the Velcro surface and the Velcro hook surface.

4. The gear tooth top flatness detection device according to claim 3, characterized in that: The width of the imaging range of the tooth top of the gear (3) of the reflector (5) corresponds to the width of the tooth top of the gear (3).

5. The gear tooth top flatness detection device according to claim 4, characterized in that: A paired laser beam switch (8) is provided on the holding table (1) and the horizontal frame (6), and the monitoring range of the laser beam switch (8) is aligned with the edge of the imaging range of the reflector (5).

6. The gear tooth top flatness detection device according to claim 5, characterized in that: The matching column (2) is provided with a motor for driving the matching column (2) to rotate, the controller is used to control the motor to drive the matching column (2) to drive the gear (3) to rotate, and the laser beam switch (8) is used to determine whether the gear teeth of the gear (3) have reached the monitoring range of the laser beam switch (8). If so, the controller controls the motor to brake.

7. The gear tooth top flatness detection device according to claim 6, characterized in that: A telescopic rod (9) is provided at the bottom of the horizontal frame (6), and a blowing cylinder (10) is fixedly connected to one end of the telescopic rod (9) away from the horizontal frame (6).

8. The gear tooth top flatness detection device according to claim 7, characterized in that: An annular slide rail (11) is provided at the bottom of the cross frame (6), the telescopic rod (9) is slidably connected to the slide rail, and a driving member for driving the telescopic rod (9) to slide along the slide rail is provided on the slide rail.

9. The gear tooth top flatness detection device according to claim 8, characterized in that: One end of the telescopic rod (9) away from the cross frame (6) is fixedly connected with a wiper (12), which is located on the back of the blower (10). The wiper (12) is used to clean the reflector (5) when the driving member drives the telescopic rod (9) to slide.

10. The gear tooth top flatness detection device according to claim 9, characterized in that: A trained convolutional neural network is provided in the controller. The convolutional neural network is trained based on image samples of step-shaped protrusions, depressions, collapses, scratches and textures on the tooth tops of several gears (3). The convolutional neural network is used to input an image captured by an image sensor (7) and select and mark the step-shaped protrusions, depressions, collapses, scratches and textures in the image.

Images